/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hbase.zookeeper.client.jute;

import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.TreeMap;

/**
 *
 */
public class CsvOutputArchive implements OutputArchive {

	private PrintStream stream;
	private boolean isFirst = true;

	static CsvOutputArchive getArchive(OutputStream strm) throws UnsupportedEncodingException {
		return new CsvOutputArchive(strm);
	}

	private void throwExceptionOnError(String tag) throws IOException {
		if (stream.checkError()) {
			throw new IOException("Error serializing " + tag);
		}
	}

	private void printCommaUnlessFirst() {
		if (!isFirst) {
			stream.print(",");
		}
		isFirst = false;
	}

	/** Creates a new instance of CsvOutputArchive */
	public CsvOutputArchive(OutputStream out) throws UnsupportedEncodingException {
		stream = new PrintStream(out, true, "UTF-8");
	}

	public void writeByte(byte b, String tag) throws IOException {
		writeLong((long) b, tag);
	}

	public void writeBool(boolean b, String tag) throws IOException {
		printCommaUnlessFirst();
		String val = b ? "T" : "F";
		stream.print(val);
		throwExceptionOnError(tag);
	}

	public void writeInt(int i, String tag) throws IOException {
		writeLong((long) i, tag);
	}

	public void writeLong(long l, String tag) throws IOException {
		printCommaUnlessFirst();
		stream.print(l);
		throwExceptionOnError(tag);
	}

	public void writeFloat(float f, String tag) throws IOException {
		writeDouble((double) f, tag);
	}

	public void writeDouble(double d, String tag) throws IOException {
		printCommaUnlessFirst();
		stream.print(d);
		throwExceptionOnError(tag);
	}

	public void writeString(String s, String tag) throws IOException {
		printCommaUnlessFirst();
		stream.print(Utils.toCSVString(s));
		throwExceptionOnError(tag);
	}

	public void writeBuffer(byte buf[], String tag) throws IOException {
		printCommaUnlessFirst();
		stream.print(Utils.toCSVBuffer(buf));
		throwExceptionOnError(tag);
	}

	public void writeRecord(Record r, String tag) throws IOException {
		if (r == null) {
			return;
		}
		r.serialize(this, tag);
	}

	public void startRecord(Record r, String tag) throws IOException {
		if (tag != null && !"".equals(tag)) {
			printCommaUnlessFirst();
			stream.print("s{");
			isFirst = true;
		}
	}

	public void endRecord(Record r, String tag) throws IOException {
		if (tag == null || "".equals(tag)) {
			stream.print("\n");
			isFirst = true;
		} else {
			stream.print("}");
			isFirst = false;
		}
	}

	public void startVector(List<?> v, String tag) throws IOException {
		printCommaUnlessFirst();
		stream.print("v{");
		isFirst = true;
	}

	public void endVector(List<?> v, String tag) throws IOException {
		stream.print("}");
		isFirst = false;
	}

	public void startMap(TreeMap<?,?> v, String tag) throws IOException {
		printCommaUnlessFirst();
		stream.print("m{");
		isFirst = true;
	}

	public void endMap(TreeMap<?,?> v, String tag) throws IOException {
		stream.print("}");
		isFirst = false;
	}
}
